Initial API skeleton around Material Icons

Adds base Icons object, with documentation, samples, and a test
(currently no-ops, but shows how we will compare with xml vectors).

Also removes width / height parsing from IconParser - Material icons
have recently been updated to all be 24 by 24.

Bug: b/146212531
Test: IconComparisonTest
Change-Id: I818a6bf1e30369a3189cc667f941c94292f05ade

diff --git a/ui/ui-material/icons/core/build.gradle b/ui/ui-material/icons/core/build.gradle
new file mode 100644
index 0000000..39c8b0a
--- /dev/null
+++ b/ui/ui-material/icons/core/build.gradle

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import androidx.build.LibraryGroups
+import androidx.build.LibraryVersions
+import androidx.build.Publish
+
+import static androidx.build.dependencies.DependenciesKt.*
+
+plugins {
+    id("AndroidXPlugin")
+    id("com.android.library")
+    id("AndroidXUiPlugin")
+    id("org.jetbrains.kotlin.android")
+}
+
+dependencies {
+    implementation(KOTLIN_STDLIB)
+
+    api project(":ui:ui-core")
+    api project(":ui:ui-framework")
+}
+
+androidx {
+    name = "AndroidX Core Material Icons"
+    publish = Publish.SNAPSHOT_AND_RELEASE
+    mavenVersion = LibraryVersions.UI
+    mavenGroup = LibraryGroups.UI
+    inceptionYear = "2020"
+    description = "AndroidX Core Material Icons"
+}